Multiple-spindle machine tool



March 24, 1931. gB 1,797,729

MULT IPLE S P I NDLE MACH I NE TOOL Filed Dec. 13. 1928 8 Sheets-Sheet 1j //7 ven for:

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March 24, 1931. I c. a. DR BEL 1,797,729

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MarCh 24, 1931. c, ORBEL 1,797,729

MULTIPLE SPINDLE MACHINE TOOL Filed Deb. 15. 1928 a Sheets-Sheet 4 YFig.6

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March 24, 1931. c; QRBEL 1,797,729

' MULTIPLE SPINDLE MACHINE TOOL Filed Dec. 13. 1928 I 8 Sheets-Sheet 5//7 ventor: L' art 5- Drb e 1 1; Alf-tarry.

March 24, 1931. O BEL 1,797,729

MULTIPLE SPINDLE MACHINE TOOL Filed Dec. 13. '1928 S'SheetS-Sheet eYnventor: Cur 2. 6- "D81 March 24,1931; QGORBEL' I 1,797,729

MULTIPLE SPINDLE MACHINE TOOL Filed Dec. 13, 1928 8 Sheets-Sheet 7Inventor:

Curl 6'1 Orbal la Aw C G. ORBE MULTIPLE slim mm MACHINE TOOL March 24,1931 Filed Dec.

Ca l, 9 Orel Jl'a 0-4214.

Patentedh'iar. 24%, 1931 p Fries CURT G. ORBEIVJ, OF LEIPZIG,GERIv'LEAN'Z', ASSEGNOB TO Mil'LLEB &' IEONTAG, G-ESELL- SGHAFT, MIT

I'A NY BE SCI-ERRNKTER HAFT'UNG, 6F LEIFZIG, GEEIEAIGT Y, A GER/LEANCON- MULTIPLE-SPINQDL-E MACH ENE TOOL Application filed December 1 3,1928, Serialll'o; 32* 738, and. in Germany December 24, 1927.

The invention relates to a multiple spindle machine tool. known, inwhich a boring spindle and a thread cutting spindlecapable of being conpled by axial displacement-with a forward or a backward driveare mountedin the machine frame. The object of the present invention is to effectwith; machines of. this kind with two or more spindles a saving in time0 and labour by means ofan adjustable arrange'ment of the holder forthework piece on a slide mounted so as to be sliuableinthe direction ofthe spindles, insuch manner that the workplece holder can be broughtsuccessively into the positions necessary fertile-' working of the saidwork piece by meansot thetools mounted ontne various spindles- Inconsequence of this the machine is particularly useful for the workingof work.

working operations haste be carried out, such as, for instance, takingthe simplestcasmthe boring of a hole and the'cutting of atemale threadinfthe said hole. I In this simplest case r the adjustable workpieceholder is arranged so as to be capable of swinging betweenstops.

on the slide which is slieable in the direction of the spindles, in suchmanner that the said work piece holder takes up in its one end posietion the position necessary for the start of the boring operation and inits other end position the position necessary for the thread cuttingoperation. v

hen it is desired to carry out more than two working operations on thesame workpiece by the aid of diii'erent tools, the swing ing workpieceholder is mounted on a slide which is'inounted so as to beslidabletransversely to the directionot the spindles,'the transversemotion of the slide being limited by stops in such manner that in eachof the two end positions of the slide determined by the stops theworkpiece can be-adjusted by swinging the workpiece holder between itsstops withrega-rd to the two tool spindles.

The number of tool spindles may be further increased by the provisionotintermediate positions for theslide'.

Two preferred constructional forms according to the invention areillustrated by Machines of this kind arf Fig. 8, I g

Fig. 101s avertical section on the broken.

' Bis a horizontal section on line 3+8 of Fig. 2, y 1 g I p F 1g.'4; isavertical section'on l1ne4 -.4 of ig.3,

Fig.

5 is a vertical horizontal section on the brokenline 5 -5 of Fig.4, i vV F g. 6- s' anelevation of a modified form of constructlon,

Fig. r is a. side View of the upper part of the machine seen 1n thedlrectlon of the arrow drawn in Fig. 6, W y

, Fi g. 8: is a horizontal section on line 8-8 of Fig. 7, v 1

Fig. 9is a vertical section on line 9-9 of line. 10-10 of Fig.

Fig. 11 shows on a larger scale a view of the coupling of thethleadcutting spindle after removal of the closing plate and Fig. 12-is asection on line 12-12 ofFig.,11.-

On a box-like lower frame 1 is fixed a spin- "dle box 2having a lateralprojection 3, which 1s formed as a guide for the work piece slide 4. Inthe side walls 5, 6 of the spindle box is mounted a driving shaft 8provided with a stepped pulley 7, on which shaft are pinned two ge'arso'f different size, a smaller one 9' and a larger one 10 The smallergear 9 engages with a gear 11, which is loosely mounted on a spindle 12journalled in the side walls 5, 6 I

of the spindle box and the gear 10 of the driving shai tengages with agear 13, which is pinned to a spindle 14 journalled at the same heightas the spindle 12 in the side walls 5, 6 of the spindle box. The gear 13engages with a gear 15 loosely mounted on the spindle 12. The two gears11, 15 loosely mounted on the spindle 12 are secured against sliding onthe one hand by means ofthe bearing walls 5, 6 and onthe other hand bymeans of stops 35, which are fixed on a rod wheels 11,715 being providedon the sides SS fiIK'ed in the bearing walls 5, 6 the said a couplinmember with coupling claws '18,

one another by 90.

19 arranged on both sides is mounted on the spindle 12. The couplingclaw 18 is adapted to enter into engagement with the claw of the gear11, while the other claw 19 is adapted to engage the claw '17 of thegear 15, according to the axial displacement of the coupling member. V

The coupling (Figs. 11 and 12) consists of a dished-part, which isclosed on'the open side by means of a cover. The dished part consists ofa disc 20 with a central bore 21 for the spindle 12 and an annularperipheral projection 22,'in which two recesses of considerable depthbut lesser breadth 23 and two peripheral recesses24 ofconsiderable'breadth but-lesser depth are arranged diametricallyopposite and displaced in pairs relative to In the space enclosed by theannular projection 22 a disc 25 is inserted, which is fixed, by means ofpins to the spindle 12 and is provided ononeside with.

an inner annular projection 26 and an outer annular pro ection 27, thelatter of which i's provided with two diametrically opposite recesses 28reaching inwardly-to the face of. in the peripheral recesses the disc25. 23 ofthe dish shaped coupling part 20, 22, tongues 29 are insertedflushand fixed by means of pins, the inwardly; projecting wedge shapedends of which pins project through the recesses 28 of the outerperipheral projection 27 of the disc-25-and are held in on both sides byrubber wedges30,which are inserted between the inner, and outer annularprojections 26 and 27 of the disc and are held tight by means ofintermediate pieces 31 fixed with screws. The openside of the dishedpart is closed by means of a covering disc'32'which is's'c-rewed on. Thelatter and the dished coupling part 20 are provided on the side surfaceswith projecting coupling claws 18, 19 as aforesaid, which, on axialdisplacement of the spindle 12 enter into engagement with the couplingclaws 16,17.

The spindle 12 is the thread cutting spindie. Through the pressure ofthe work piece on the spindle, the latter becomes coupled with therotating toothed wheel 11 and thereby compresses a spring 37, which oncessationv of the pressure of the work piece pushes back the spindle,whereby it is uncoupled from the gearll and coupled with the gear15,whlch rotates in the opposite direction at a higher speed, in order towithdraw the tap.

i The spindle 14 is the boring spindle and is provided with a ballthrust bearing 38 to on able it to take up the pressure ofthe workpiece. 7 1 I 7 The workpiece slide 4, which is slidable the spindle boxand is provided with cap stan 43. According to the directionof;rotationof the capstan, the work piece chuck slide is pushed toor fro. On thefoot plate ofthe slide 4 afined guide inember-';with a vertical guidesurface 18 mounted, on which a movable guide part 46 is arranged so asto be slidable in vertical direction and adjustable by means'of screwbolts and nuts. The movable guide member is constructed in the form of abearing fork with two bearing eyelets 47. The front bearing eyelet isprovioed on both sides of the bearing bore with two extensions 48,'-inwhich two adjustable,

stop screws-49 are screw-threaded atan angle to one another. In thebearing eyelets 47, the work piece holder proper 51'f0r the work pieceis mounted by means of a bolt.

50 so as to be capableof-swinging, the said holder bein provided with astop'projection 52, which co-operates with the stop'screws 49.

The work piece holder 51 may be of any desired suitable form. For theproduction of screwthreads in the hubs of forks and the until it strikesupon the right-hand stop screw 49 (Fig. 2), whereupon the slide is drawnagainst the boring spindle by means of the capstan 43. After productionof the bore the slide is pushed back, the workpiece holder is swung tothe left until its projections strikes on the left-hand stop screw 49,-whereupon the work piece is 111' the position necessary for the cuttingof the thread. Then the slide is again drawn forward by means of thecapstan, whereby the thread cutting spindle 12 is coupled with the gear11. WVhen the thread is completely cut, the slide is pushed back, thespindle following under the action of the spring 37, whereby the spindle12 is uncoupled from the gear 11 and coupled withthe gear '15, so thatit now runs in the reverse direction and the thread cutter is withdrawnby rotation from the work piece. For the guiding of the boring tool anarm 55 is also fixed by means of bolt 56 on an ex tension 54 of theslide 4,which extension is provided with the guide slit, its arm beingporting guide therefor, a base gui e with provided at the upper end witha guide eye let 57 having an interchangeable guide bushing for theboring tool. 1 a

In Figs. 6 to 10 the machine is as having four tool spindles, and theslide 61 is mounted so as to be slidable in the direction of thespindles on the slide bed 3 arranged on the spindle box 2. The slide 61is provided with a transverse slide bed 62 for a slide la on which thework-piece holder- 51 isarranged. The slide 4a is lidable between twostop screws 63, 64 which each determine one end position of the slide inwhich the belt 50 of the workpiece holder 9 is in, such a position withregard to each of the tool spin-' dles 12, 14 and 66, 67 respectively,that the workpiece can be brought by swinging the workpiece holder 51into'the position necessary for the working operation to beieffected bythe one or the other of the spindles of the two pairs of spindles.

The pull or push rod 40 serving for bringing up the workpiece to thetools andremoving the said workpiece therefrom is fixed in an eyelet 65provided on the slide 62.

In the spindle box 2 the two spindles 12, 14 and 66, 67 are journalledside by side at the same height. The drive is eifected in known mannerfrom the stepped pulley 7 of the driv .ing shaft 8, through the gears 9,11 and the coupling 16, 18 for the forward drive or through the gears10, 13, 15 and the couplings 17, 19 for the reverse drive, to thespindle 12 [and through the gears 10, 13 directly to the spindle 14:.

:The spindle 66 is driven from the gear 11, by means of the looseintermediate wheel 68 mounted on the spindle 14 and the gear 69 which ispinned on to the spindle 66,Wl1llS'6 the spindle 67 is driven from thegear 13 mounted on the spindle 14 through an intermediate wheel 7 0mounted loosely on thespindle 66 and agear 71 which is pinned on thespindle 67. a

I claim: 1. In a multiple spindle machine tool, the

combination of: spindles, tools mounted on' said spindles, a work pieceholder and a supvertical face to which the supporting guide is mountedfor vertical displacement, a slide carrying the base guide, and a slidebed on combination of: spindles; tools mounted on said spindles aworkpiece holder and a sup: porting guide therefor, a base guide with arepresented vertical'face to which the supporting guide is mounted forvertical displacement; a slide carrying the base guide; a slide bed onwhich said sl de is mounted so as to be slidable in the directionof'said spindles; said supporting guide being I V tween which the workpiece l10-l8l is mo unted by a-pivot pin for adgustment in an are ofwhich thepivot pin is the center; and stops on'the supporting guidelaterally of said workpiece holder, between which stops said workpieceholder is adapt-ed to swing on an arc insuch manner that the ork piecein the one end position of the holder takes-up the position necessaryfor the operation of one tool, and in the other end position takes up ithe position necessary for the operation of another tool. I

in a multiple spindle machine tool, a

. combination as specified in claim 1, wherein spindles consist of aboring spindle and a thread cutting spindle, in further combinationwith: driving shaft with which said thread cutting spindle is capable ofbeing coupled for forward and backward running :byaxial displacement,and two coupling wheels serv ng for the coupling of said thread cuttingspindle, one of said coupling wheels being drivendirectly from saiddriving shaft and the other of said wheels being driven froinsaiddriving shaft through the intermediary of saidboring spindle.

l. In a multiple spindlemachine tool,

combination as specified in claim 2, in which v said stops are arrangedat an angle to one another on said supporting guide and arcadj'ustable.

5. In a multiple spindle machine tool, a combination as specified inclaim 'l, wherein said workpiece holderis provided with aninterchangeable pin for the reception of the workpieceswhich areprovided with a bore and which are intended to receive a femalethreaded. bore at right angles to said first named bore.

6. In a multiple spindle machine tool, a combination as specified inclaim 1, wherein said slide is provided with an adjustable arm having aneyelet carrying an interchangeable guide bush. I g

7. In a multiple spindle 'machine tool, a combination as specified inclaim 1, wherein a second slide carries the supporting guide,

said second slide being mounted on the first formed with hearin armsbeslide so as to be slidable thereon transversely.

tothe direction of. said s indles in further 7 combination with stopsadapted to limit the transverse motion of said second slide.

8. In a multiple spindle machine tool, a combination as specified inclaim 1, wherein said slide is mountedon said slide bed so as to beslidable thereon transversely to the direction of said spindles as wellas in the said direction, in further combination with stops adapted tolimit the transverse motion of said slide in such manner as to determineits 10oation in one of two end positions in each of which positions theworkpiece holder can be swing into positions necessary for the operation'o'f two of said tools, and further stops adapted to limit theswinging movement of said workpiece holder.

. .CURT G. @R-BEL.

